BUG: sparse: get_index_dtype is called in some places with ndarray as first arg
BUG: sparse: restore previous behavior in numpy ufuncs with object arrays

Some users may rely on ufuncs distributing operations on sparse matrices
across each entry of an object array.

Fixes gh-3345
BUG: fix use of np.max in stats.fisher_exact

fixes #3014
Merge pull request #3346 from pv/sparse-cvxopt-fix

BUG: sparse: restore previous behavior in numpy ufuncs with object arrays
DOC: add note that splint assumes the spline function to be zero outside the data interval
Merge pull request #3347 from andreas-h/gh3014

BUG: fix use of np.max in stats.fisher_exact
Merge pull request #3349 from andreas-h/gh1918

DOC: interpolate: add note that splint assumes the spline function to be zero outside...